YOU SAID:

i am going to a party i will be back at 7 am

INTO JAPANESE

私はパーティーに行きます私は午前7時に戻ってきます

BACK INTO ENGLISH

I will go to the party I will come back at 7 AM

INTO JAPANESE

午前7時に戻ってくるパーティーに行きます

BACK INTO ENGLISH

I am going to a party coming back at 7 AM

INTO JAPANESE

午前7時に戻ってくるパーティーに行きます

BACK INTO ENGLISH

I am going to a party coming back at 7 AM